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leds: add rgb13h led flash
Change-Id: Iafd7db5aa53ea70d9a6aa45f8270a3d3fd43bf4e Signed-off-by: Cai YiWei <cyw@rock-chips.com>
This commit is contained in:
Cai YiWei
Tao Huang
parent
b88174b49a
commit
758a5b4ecb
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@ -670,6 +670,12 @@ config LEDS_IS31FL32XX
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LED controllers. They are I2C devices with multiple constant-current
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channels, each with independent 256-level PWM control.
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config LEDS_RGB13H
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tristate "LED support for DL3020RGB13H flash LED controller"
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depends on LEDS_CLASS_FLASH && GPIOLIB && OF
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help
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Say Y here to include support for DL3020RGB13H LED controllers.
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config LEDS_SC27XX_BLTC
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tristate "LED support for the SC27xx breathing light controller"
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depends on LEDS_CLASS && MFD_SC27XX_PMIC
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@ -70,6 +70,7 @@ obj-$(CONFIG_LEDS_KTD2692) += leds-ktd2692.o
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obj-$(CONFIG_LEDS_POWERNV) += leds-powernv.o
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obj-$(CONFIG_LEDS_IS31FL319X) += leds-is31fl319x.o
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obj-$(CONFIG_LEDS_IS31FL32XX) += leds-is31fl32xx.o
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obj-$(CONFIG_LEDS_RGB13H) += leds-rgb13h.o
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obj-$(CONFIG_LEDS_PM8058) += leds-pm8058.o
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obj-$(CONFIG_LEDS_MLXCPLD) += leds-mlxcpld.o
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obj-$(CONFIG_LEDS_MLXREG) += leds-mlxreg.o
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567
drivers/leds/leds-rgb13h.c
Normal file
567
drivers/leds/leds-rgb13h.c
Normal file
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@ -0,0 +1,567 @@
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2019 Fuzhou Rockchip Electronics Co., Ltd.
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-subdev.h>
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/led-class-flash.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/platform_device.h>
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#include <linux/rk-camera-module.h>
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#include <linux/rk-led-flash.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/version.h>
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#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x0)
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#define FLASH_TIMEOUT_MIN 1000
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#define FLASH_TIMEOUT_STEP 1000
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struct rgb13h_led {
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struct platform_device *pdev;
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struct led_classdev_flash fled_cdev;
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struct v4l2_ctrl_handler ctrls;
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struct v4l2_subdev sd;
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/* secures access to the device */
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struct mutex lock;
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struct gpio_desc *gpio_en;
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/* maximum LED current in torch mode*/
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u32 max_mm_current;
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/* maximum LED current in flash mode */
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u32 max_flash_current;
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/* maximum flash timeout */
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u32 max_flash_tm;
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u32 intensity;
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bool strobe_state;
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/* brightness cache */
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u32 torch_brightness;
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/* assures led-triggers compatibility */
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struct work_struct work_brightness_set;
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struct timeval timestamp;
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u32 timeout;
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bool waiting;
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wait_queue_head_t done;
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struct work_struct work_timeout;
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enum v4l2_flash_led_mode led_mode;
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u32 module_index;
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const char *module_facing;
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};
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static struct rgb13h_led *fled_cdev_to_led(struct led_classdev_flash *fled_cdev)
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{
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return container_of(fled_cdev, struct rgb13h_led, fled_cdev);
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}
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static struct rgb13h_led *sd_to_led(struct v4l2_subdev *subdev)
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{
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return container_of(subdev, struct rgb13h_led, sd);
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}
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static int rgb13h_set_output(struct rgb13h_led *led, bool on)
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{
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mutex_lock(&led->lock);
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gpiod_direction_output(led->gpio_en, on);
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if (!on) {
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led->strobe_state = false;
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if (led->waiting) {
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led->waiting = false;
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wake_up(&led->done);
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}
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} else {
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led->timestamp = ns_to_timeval(ktime_get_ns());
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}
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mutex_unlock(&led->lock);
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return 0;
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}
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static void rgb13h_timeout_work(struct work_struct *work)
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{
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struct rgb13h_led *led =
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container_of(work, struct rgb13h_led, work_timeout);
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wait_event_timeout(led->done, !led->waiting,
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usecs_to_jiffies(led->timeout));
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if (led->waiting) {
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led->waiting = false;
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led->strobe_state = false;
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rgb13h_set_output(led, false);
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}
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}
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static void rgb13h_brightness_set_work(struct work_struct *work)
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{
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struct rgb13h_led *led =
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container_of(work, struct rgb13h_led, work_brightness_set);
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rgb13h_set_output(led, !!led->torch_brightness);
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}
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static void rgb13h_led_brightness_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
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struct rgb13h_led *led = fled_cdev_to_led(fled_cdev);
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led->torch_brightness = brightness;
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schedule_work(&led->work_brightness_set);
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}
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static int rgb13h_led_brightness_set_sync(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
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struct rgb13h_led *led = fled_cdev_to_led(fled_cdev);
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rgb13h_set_output(led, !!brightness);
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return 0;
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}
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static int rgb13h_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
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bool state)
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{
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struct rgb13h_led *led = fled_cdev_to_led(fled_cdev);
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mutex_lock(&led->lock);
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led->strobe_state = state;
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if (state) {
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led->waiting = true;
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schedule_work(&led->work_timeout);
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}
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mutex_unlock(&led->lock);
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return rgb13h_set_output(led, state);
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}
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static int rgb13h_led_flash_strobe_get(struct led_classdev_flash *fled_cdev,
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bool *state)
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{
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struct rgb13h_led *led = fled_cdev_to_led(fled_cdev);
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mutex_lock(&led->lock);
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*state = led->strobe_state;
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mutex_unlock(&led->lock);
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return 0;
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}
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static int rgb13h_led_flash_timeout_set(struct led_classdev_flash *fled_cdev,
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u32 timeout)
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{
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struct rgb13h_led *led = fled_cdev_to_led(fled_cdev);
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mutex_lock(&led->lock);
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led->timeout = timeout;
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mutex_unlock(&led->lock);
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return 0;
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}
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static int rgb13h_led_parse_dt(struct rgb13h_led *led,
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struct device_node **sub_node)
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{
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struct led_classdev *led_cdev = &led->fled_cdev.led_cdev;
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struct device *dev = &led->pdev->dev;
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struct device_node *child_node = dev->of_node;
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int ret = 0;
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ret = of_property_read_u32(child_node,
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RKMODULE_CAMERA_MODULE_INDEX,
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&led->module_index);
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ret |= of_property_read_string(child_node,
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RKMODULE_CAMERA_MODULE_FACING,
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&led->module_facing);
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if (ret) {
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dev_err(dev, "could not get module information!\n");
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return -EINVAL;
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}
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led->gpio_en = devm_gpiod_get(dev, "enable", GPIOD_ASIS);
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if (IS_ERR(led->gpio_en)) {
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ret = PTR_ERR(led->gpio_en);
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dev_err(dev, "Unable to claim enable-gpio\n");
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return ret;
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}
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led_cdev->name = of_get_property(child_node, "label", NULL) ? :
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child_node->name;
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ret = of_property_read_u32(child_node, "led-max-microamp",
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&led->max_mm_current);
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if (ret < 0)
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dev_warn(dev,
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"led-max-microamp DT property missing\n");
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ret = of_property_read_u32(child_node, "flash-max-microamp",
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&led->max_flash_current);
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if (ret < 0) {
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dev_err(dev,
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"flash-max-microamp DT property missing\n");
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return ret;
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}
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ret = of_property_read_u32(child_node, "flash-max-timeout-us",
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&led->max_flash_tm);
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if (ret < 0) {
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dev_err(dev,
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"flash-max-timeout-us DT property missing\n");
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return ret;
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}
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*sub_node = child_node;
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return ret;
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}
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static int rgb13h_led_get_configuration(struct rgb13h_led *led,
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struct device_node **sub_node)
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{
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int ret;
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ret = rgb13h_led_parse_dt(led, sub_node);
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if (ret < 0)
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return ret;
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return 0;
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}
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static void rgb13h_init_flash_timeout(struct rgb13h_led *led)
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{
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struct led_classdev_flash *fled_cdev = &led->fled_cdev;
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struct led_flash_setting *setting;
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/* Init flash timeout setting */
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setting = &fled_cdev->timeout;
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setting->min = FLASH_TIMEOUT_MIN;
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setting->max = led->max_flash_tm;
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setting->step = FLASH_TIMEOUT_STEP;
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setting->val = setting->max;
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}
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static int rgb13h_get_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct rgb13h_led *led =
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container_of(ctrl->handler, struct rgb13h_led, ctrls);
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switch (ctrl->id) {
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case V4L2_CID_FLASH_FAULT:
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ctrl->val = 0;
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break;
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case V4L2_CID_FLASH_STROBE_STATUS:
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if (led->led_mode != V4L2_FLASH_LED_MODE_FLASH) {
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ctrl->val = 0;
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break;
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}
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ctrl->val = led->strobe_state;
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break;
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case V4L2_CID_FLASH_INTENSITY:
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case V4L2_CID_FLASH_TORCH_INTENSITY:
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ctrl->val = led->intensity;
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break;
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case V4L2_CID_FLASH_LED_MODE:
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ctrl->val = led->led_mode;
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break;
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default:
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dev_err(&led->pdev->dev,
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"ctrl 0x%x not supported\n", ctrl->id);
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return -EINVAL;
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}
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return 0;
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}
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static int rgb13h_set_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct rgb13h_led *led =
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container_of(ctrl->handler, struct rgb13h_led, ctrls);
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switch (ctrl->id) {
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case V4L2_CID_FLASH_LED_MODE:
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led->led_mode = ctrl->val;
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rgb13h_set_output(led, LED_OFF);
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if (led->led_mode == V4L2_FLASH_LED_MODE_TORCH)
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return rgb13h_set_output(led, !!led->intensity);
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break;
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case V4L2_CID_FLASH_STROBE_SOURCE:
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if (ctrl->val == V4L2_FLASH_STROBE_SOURCE_EXTERNAL)
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return -EBUSY;
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break;
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case V4L2_CID_FLASH_STROBE:
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if (led->led_mode != V4L2_FLASH_LED_MODE_FLASH)
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return -EBUSY;
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return rgb13h_led_flash_strobe_set(&led->fled_cdev, true);
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case V4L2_CID_FLASH_STROBE_STOP:
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if (led->led_mode != V4L2_FLASH_LED_MODE_FLASH)
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return -EBUSY;
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return rgb13h_led_flash_strobe_set(&led->fled_cdev, false);
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case V4L2_CID_FLASH_TIMEOUT:
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return rgb13h_led_flash_timeout_set(&led->fled_cdev, ctrl->val);
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case V4L2_CID_FLASH_INTENSITY:
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break;
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case V4L2_CID_FLASH_TORCH_INTENSITY:
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if (led->led_mode != V4L2_FLASH_LED_MODE_TORCH)
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break;
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led->intensity = ctrl->val;
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return rgb13h_set_output(led, !!ctrl->val);
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default:
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dev_err(&led->pdev->dev,
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"ctrl 0x%x not supported\n", ctrl->id);
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return -EINVAL;
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}
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return 0;
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}
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static const struct v4l2_ctrl_ops rgb13h_ctrl_ops = {
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.g_volatile_ctrl = rgb13h_get_ctrl,
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.s_ctrl = rgb13h_set_ctrl,
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};
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static int rgb13h_init_controls(struct rgb13h_led *led)
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{
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struct v4l2_ctrl *ctrl = NULL;
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v4l2_ctrl_handler_init(&led->ctrls, 10);
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/* V4L2_CID_FLASH_LED_MODE */
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v4l2_ctrl_new_std_menu(&led->ctrls, &rgb13h_ctrl_ops,
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V4L2_CID_FLASH_LED_MODE, 2, ~7,
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V4L2_FLASH_LED_MODE_NONE);
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led->led_mode = V4L2_FLASH_LED_MODE_NONE;
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/* V4L2_CID_FLASH_STROBE_SOURCE */
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v4l2_ctrl_new_std_menu(&led->ctrls, &rgb13h_ctrl_ops,
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V4L2_CID_FLASH_STROBE_SOURCE,
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0, ~1, V4L2_FLASH_STROBE_SOURCE_SOFTWARE);
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/* V4L2_CID_FLASH_STROBE */
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v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops,
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V4L2_CID_FLASH_STROBE, 0, 0, 0, 0);
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/* V4L2_CID_FLASH_STROBE_STOP */
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v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops,
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V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0);
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/* V4L2_CID_FLASH_STROBE_STATUS */
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ctrl = v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops,
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V4L2_CID_FLASH_STROBE_STATUS,
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0, 1, 1, 0);
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led->strobe_state = false;
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if (ctrl)
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ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
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/* V4L2_CID_FLASH_TIMEOUT */
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v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops,
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V4L2_CID_FLASH_TIMEOUT, FLASH_TIMEOUT_MIN,
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led->max_flash_tm, FLASH_TIMEOUT_STEP,
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led->max_flash_tm);
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led->timeout = led->max_flash_tm;
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/* V4L2_CID_FLASH_INTENSITY */
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v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops,
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V4L2_CID_FLASH_INTENSITY, 0,
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led->max_flash_current,
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led->max_flash_current,
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led->max_flash_current);
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/* V4L2_CID_FLASH_TORCH_INTENSITY */
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v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops,
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V4L2_CID_FLASH_TORCH_INTENSITY, 0,
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led->max_mm_current,
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led->max_mm_current,
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led->max_mm_current);
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led->intensity = led->max_mm_current;
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/* V4L2_CID_FLASH_FAULT */
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ctrl = v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops,
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V4L2_CID_FLASH_FAULT, 0,
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V4L2_FLASH_FAULT_OVER_VOLTAGE |
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V4L2_FLASH_FAULT_TIMEOUT |
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V4L2_FLASH_FAULT_OVER_TEMPERATURE |
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V4L2_FLASH_FAULT_SHORT_CIRCUIT, 0, 0);
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if (ctrl)
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ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
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led->sd.ctrl_handler = &led->ctrls;
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return led->ctrls.error;
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}
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static long rgb13h_ioctl(struct v4l2_subdev *sd,
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unsigned int cmd, void *arg)
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{
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struct rgb13h_led *led = sd_to_led(sd);
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struct timeval *t;
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if (cmd == RK_VIDIOC_FLASH_TIMEINFO) {
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t = (struct timeval *)arg;
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t->tv_sec = led->timestamp.tv_sec;
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t->tv_usec = led->timestamp.tv_usec;
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} else {
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return -EINVAL;
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}
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return 0;
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}
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#ifdef CONFIG_COMPAT
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#define RK_VIDIOC_COMPAT_FLASH_TIMEINFO \
|
||||
_IOR('V', BASE_VIDIOC_PRIVATE + 0, struct compat_timeval)
|
||||
static long rgb13h_compat_ioctl32(struct v4l2_subdev *sd,
|
||||
unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
struct timeval t;
|
||||
struct compat_timeval compat_t;
|
||||
struct compat_timeval __user *p32 = compat_ptr(arg);
|
||||
|
||||
if (cmd == RK_VIDIOC_COMPAT_FLASH_TIMEINFO) {
|
||||
rgb13h_ioctl(sd, RK_VIDIOC_FLASH_TIMEINFO, &t);
|
||||
compat_t.tv_sec = t.tv_sec;
|
||||
compat_t.tv_usec = t.tv_usec;
|
||||
put_user(compat_t.tv_sec, &p32->tv_sec);
|
||||
put_user(compat_t.tv_usec, &p32->tv_usec);
|
||||
} else {
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static const struct v4l2_subdev_core_ops v4l2_flash_core_ops = {
|
||||
.ioctl = rgb13h_ioctl,
|
||||
#ifdef CONFIG_COMPAT
|
||||
.compat_ioctl32 = rgb13h_compat_ioctl32
|
||||
#endif
|
||||
};
|
||||
|
||||
static const struct v4l2_subdev_ops v4l2_flash_subdev_ops = {
|
||||
.core = &v4l2_flash_core_ops,
|
||||
};
|
||||
|
||||
static const struct led_flash_ops flash_ops = {
|
||||
.strobe_set = rgb13h_led_flash_strobe_set,
|
||||
.strobe_get = rgb13h_led_flash_strobe_get,
|
||||
.timeout_set = rgb13h_led_flash_timeout_set,
|
||||
};
|
||||
|
||||
static int rgb13h_led_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct device_node *sub_node = NULL;
|
||||
struct rgb13h_led *led;
|
||||
struct led_classdev *led_cdev;
|
||||
struct led_classdev_flash *fled_cdev;
|
||||
struct v4l2_subdev *sd = NULL;
|
||||
char facing[2];
|
||||
int ret;
|
||||
|
||||
dev_info(dev, "driver version: %02x.%02x.%02x",
|
||||
DRIVER_VERSION >> 16,
|
||||
(DRIVER_VERSION & 0xff00) >> 8,
|
||||
DRIVER_VERSION & 0x00ff);
|
||||
|
||||
led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
|
||||
if (!led)
|
||||
return -ENOMEM;
|
||||
|
||||
led->pdev = pdev;
|
||||
platform_set_drvdata(pdev, led);
|
||||
|
||||
fled_cdev = &led->fled_cdev;
|
||||
fled_cdev->ops = &flash_ops;
|
||||
led_cdev = &fled_cdev->led_cdev;
|
||||
|
||||
ret = rgb13h_led_get_configuration(led, &sub_node);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
mutex_init(&led->lock);
|
||||
|
||||
/* Initialize LED Flash class device */
|
||||
led_cdev->brightness_set = rgb13h_led_brightness_set;
|
||||
led_cdev->brightness_set_blocking = rgb13h_led_brightness_set_sync;
|
||||
led_cdev->max_brightness = LED_FULL;
|
||||
led_cdev->flags |= LED_DEV_CAP_FLASH;
|
||||
INIT_WORK(&led->work_brightness_set, rgb13h_brightness_set_work);
|
||||
|
||||
/* Init strobe timeout handle */
|
||||
led->waiting = false;
|
||||
init_waitqueue_head(&led->done);
|
||||
INIT_WORK(&led->work_timeout, rgb13h_timeout_work);
|
||||
|
||||
rgb13h_init_flash_timeout(led);
|
||||
|
||||
/* Register LED Flash class device */
|
||||
ret = led_classdev_flash_register(&pdev->dev, fled_cdev);
|
||||
if (ret < 0)
|
||||
goto err_flash_register;
|
||||
|
||||
sd = &led->sd;
|
||||
sd->dev = dev;
|
||||
v4l2_subdev_init(sd, &v4l2_flash_subdev_ops);
|
||||
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
||||
memset(facing, 0, sizeof(facing));
|
||||
if (strcmp(led->module_facing, "back") == 0)
|
||||
facing[0] = 'b';
|
||||
else
|
||||
facing[0] = 'f';
|
||||
snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
|
||||
led->module_index, facing,
|
||||
led_cdev->name, dev_name(sd->dev));
|
||||
ret = media_entity_pads_init(&sd->entity, 0, NULL);
|
||||
if (ret < 0)
|
||||
goto error_v4l2_flash_init;
|
||||
|
||||
sd->entity.function = MEDIA_ENT_F_FLASH;
|
||||
ret = rgb13h_init_controls(led);
|
||||
if (ret < 0)
|
||||
goto err_init_controls;
|
||||
|
||||
ret = v4l2_async_register_subdev(sd);
|
||||
if (ret < 0)
|
||||
goto err_async_register_sd;
|
||||
|
||||
return 0;
|
||||
|
||||
err_async_register_sd:
|
||||
v4l2_ctrl_handler_free(sd->ctrl_handler);
|
||||
err_init_controls:
|
||||
media_entity_cleanup(&sd->entity);
|
||||
error_v4l2_flash_init:
|
||||
led_classdev_flash_unregister(fled_cdev);
|
||||
err_flash_register:
|
||||
mutex_destroy(&led->lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rgb13h_led_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct rgb13h_led *led = platform_get_drvdata(pdev);
|
||||
|
||||
v4l2_async_unregister_subdev(&led->sd);
|
||||
v4l2_ctrl_handler_free(led->sd.ctrl_handler);
|
||||
media_entity_cleanup(&led->sd.entity);
|
||||
led_classdev_flash_unregister(&led->fled_cdev);
|
||||
|
||||
mutex_destroy(&led->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id rgb13h_led_dt_match[] = {
|
||||
{ .compatible = "led,rgb13h" },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, rgb13h_led_dt_match);
|
||||
|
||||
static struct platform_driver rgb13h_led_driver = {
|
||||
.probe = rgb13h_led_probe,
|
||||
.remove = rgb13h_led_remove,
|
||||
.driver = {
|
||||
.name = "rgb13h-flash",
|
||||
.of_match_table = rgb13h_led_dt_match,
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(rgb13h_led_driver);
|
||||
|
||||
MODULE_DESCRIPTION("GPIO LEDS Flash driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue
Block a user